I should have mentioned that Moon+ don't copy the books but only links it to the app. But that's what I also liked about Moon+.
If you're worried about sorting your books into folders, you can do that via Calibre. Depending on your settings, once you send the books Calibre will automatically create folders (by author or series).
Here's my current set up. They're all sorted in folders via Author name. And they have the series, title, and author.
